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Function (SQL)

Function (SQL) ek database object hai jo input parameters accept karta hai, kuch processing karta…

Overview

Function (SQL) — Quick Facts

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Field: Detail

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Full Name: Function (SQL / Database)

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Also Known As: SQL Function, Stored Function, UDF

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Domain: Database Engineering, SQL…

Topic 1

Infobox

📚 | Field | Detail | |---|---| | Full Name | Function (SQL / Database) | | Also Known As |…

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SQL Function Kya Hai

💡 SQL me function ek named routine hai jo: 1. Zero ya zyada input parameters accept karta…

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Kyun Important Hai

🎯 1. Code Reuse: Ek baar logic likho, baar baar queries me use karo 2. Consistency: Har…

Topic 4

Types of SQL Functions

⭐ | Type | Description | Returns | Example | Use Case | |---|---|---|---|---| | Aggregate |…

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Built-in Functions Overview

🔑 Aggregate Functions `sql SELECT COUNT(*) AS total_users, SUM(salary) AS total_salary,…

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User-Defined Functions (UDF)

✨ Developer khud functions bana sakta hai jab built-in functions sufficient na hon: Scalar…

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Function Execution Flow

🌟 `mermaid graph TD A[SQL Query with Function Call] --> B[Parser identifies function…

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Function vs Stored Procedure

🚀 | Aspect | Function | Stored Procedure | |---|---|---| | Return Value | Mandatory (always…

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Database Comparison

📚 | Feature | MySQL | PostgreSQL | SQL Server | Oracle | SQLite | |---|---|---|---|---|---|…

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Window Functions

💡 Window functions ek special category hain — yeh aggregate jaise kaam karti hain lekin…

Topic 11

Best Practices

🎯 1. DETERMINISTIC mark karo agar same input hamesha same output deta hai — optimizer…

Comparison

Function vs Stored Procedure

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Return Value: Mandatory (always returns)

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Return Type: Scalar value ya table

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Use in SELECT: Yes — SELECT fn()

Comparison

Database Comparison

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Scalar UDF: Yes

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Table-valued UDF: No (workaround via…

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Language: SQL only

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Function (SQL) ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Function (SQL) ka 'Full Name' kya hai?

Complete! 🎉

Function (SQL) Complete!

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Function (SQL) Complete

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Function (SQL)

Function (SQL) — Quick Facts

Field: Detail

Full Name: Function (SQL / Database)

Also Known As: SQL Function, Stored Function, UDF

Domain: Database Engineering, SQL…

Infobox

SQL Function Kya Hai

Kyun Important Hai

Types of SQL Functions

Built-in Functions Overview

User-Defined Functions (UDF)

Function Execution Flow

Function vs Stored Procedure

Database Comparison

Window Functions

Best Practices

Function vs Stored Procedure

Return Value: Mandatory (always returns)

Return Type: Scalar value ya table

Use in SELECT: Yes — SELECT fn()

Database Comparison

Scalar UDF: Yes

Table-valued UDF: No (workaround via…

Language: SQL only

Visual Flow

See Also

SQL

Stored procedure

Query

Aggregate function

Window function

Database

Quiz — Question 1

Quiz — Question 2

Function (SQL) Complete!

Function (SQL) Complete

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